Agitator insert for stoker retorts



A. J. RADDATZ AGI'I'ATOR INSERT FOR STOKER RETORTS June 20, 1939.

Filed April 17, 1937 INVENTOR BY M.

4 ATTORNEYS Patented June 20, 1939 UNITED STATES PATENT OFFICE AGITATOR msnn'r FOR s'roxnn mrron'rs August J. mam, Milwaukee, Wis. Application April 1-1, 1931, Serial No. 131,454

2 Y Claims.

My invention relates to improvements in agitator inserts for stoker retorts.

The object of my invention is to provide an agitator insert for the retort of a stoker.

More particularly stated, it is the object of my invention to provide an agitator for a stoker retort, such agitator being so devised as to be directly motivated and operated by the mechanical device which passes fuel to the retort and to so dispose the agitator in the retort that the agitator structure of my device may be easily inserted in the retort in the assembly of the various parts of the stoker.

In the drawing:

Figure 1 is a vertical section through the fuel feed. tube and retort of a conventional type of domestic stoker and showing my agitator device coupled to the fuel feeding device and provided with a bearing in the retort wall,

Figure 2 is a plan view of the structure shown in Figure 1 with the tuyre section removed and showing a portion of the retort broken away to exhibit the bearing for-my agitator.

Figure 3 is a detail of a bearingoonstruction alternative to that shown in Figurel and disclosing a pocket in the retort wall with a portion of the tuyre section to complete the top surface or closure for the bearing pocket.

Like parts are designated by the same reference characters throughout the several views.

One of the difliculties encountered in the day to day operation of a domestic stoker is the blocking of the retort because of the coking oi the fuel in the retort with the result that air mp ply for the suppbrt of combustion in and. above the retort is shut oif and the carefully predetermined proportions of fuel and air necessary to the proper operation of the. stoker are thus disturbed, I have therefore provided improved means for agitating the fuel in the zone where the serious results of such coking take place. I am aware that agitators for the retorts of stokers have heretofore been provided but they have been so constructed as to require complicated and expensive power connections. One of the important features of my invention is the simplicity of mechanical structure involved in my agitator and its power connections.

In the drawing disclosed, my agitator I0 is disposed in the retort ll of a somewhat conventional domestic type stoker.' In such a stoker as shown in the drawing the retort ll includes a superposed tuyere section l2 mounted upon a box-like housing l3. In the operation of the stoker air is supplied to the interior I of the housing l3 through an air supply tube l5 and is passed around the retort l I and through openings l6-Il into the interior of the tuyre section l2 and the air, being under pressure, is ejected from ports l8 into a zone of combustion of the fuel in 5 the retort.

Fuel is fed to the retort through a feed tube I9 in which is a revoluble feed screw which terminates at 2| in the throat 22 of the retort.

My agitator device Ill includes a rod-like mem- 10 her 25 with branch arms 26 and extends from a point adjacent the terminal 2| of the feed screw 20 upwardly angularly to a bearing point 23 in the wall 24 of the retort. By means of interlocked staples 21 and 28 secured to the member 16 25 and to the terminal 2| of the feed screw respectively, I provide power connection between the feed screw 20 and my agitator device It. By means of these staples I provide universal power connection so that my agitator may extend angu- 20 larly upwardly and the arms 26 may swing adjacent the air ports l8 where the effect of the coking heretofore referred to is directly reflected,

It will be noted that in Figure 1 that I have shown staple 28 forming part of a threaded plug 25 30 extending into threaded connection with the feed screw 20. Such a connection may easily be 4 made by any mechanicso that my agitator may be installed in any stoker which has a feed screw and which has a configuration of retort wall 24 30 in conjunction with which a bearing may be established as shown in Figure 3, since the simplest type of bearing socket 3| may be chiseled in the upper surface of the housing l3 whereby the placing of the tuyre section 12 thereabove 35 may complete a pocket into which the end of the stem or rod 25 of my agitator may be received.

It will be seen from the above description that I have provided an extremely simple agitator device easily installable in conjunction with any stoker which is provided with a rotatably fuel feed member such as the screw 20, and the construction of my agitator is such that the coked fuel in the region of the tuyere section is broken up 45 so as to liberate the air through ports l8.

I claim:

1. A retort forthe reception and combustion of fuel, a tube and a rotary fuel feeding device therein for passage of fuel to the retort, said 50 rotary device having a terminal portion adjacent the connection of the tube with the retort, an agitator device extending substantially across retort and angularly disposed with reference to the axis of rotation of the fuel feeding device and a power connection betweenthe fuel feeding minal portion fuel feeding extenddevice andtheagitator. in: substantially across the retort and provided 2.-Afuel feedingendburning structure inciudwith a. bearing with I. well of ihzatubeanda'rotnryfuelfeedingdevicethere theretortatepointlpeeedfromthetnhennda in. a. retort comprising a chamber-forming enpower transmitting betweemthe ro- 5 larxement at the end of said tube and opposite tary fuel feeding device and the'n itatori the terminal portion of the fuel feeding device, a 1 fuel agitator extending angulariy from said ter- VAUGUSI J. M12. 

